Built for performance, the FCS II Matt Biolos Mayhem PC Carbon Quad Rear Fin Set delivers maximum speed, drive, and control when surfed as a quad. The 80/20 foil allows for smooth, responsive turns while maintaining stability and flow through carves, giving surfers the confidence to push hard in all conditions.
Fin Size Detail
| Size | Fin | Depth | Base | Area | Sweep | Foil |
| Medium | Quad Rear | 4.26″ | 4.10″ | 12.64″² | 32.4° | 50/50 |
| Large | Quad Rear | 4.26″ | 4.10″ | 12.64″² | 32.4° | 50/50 |
